在電(dian)(dian)(dian)阻(zu)、電(dian)(dian)(dian)容(rong)、電(dian)(dian)(dian)感(gan)串(chuan)聯電(dian)(dian)(dian)路中，出現(xian)電(dian)(dian)(dian)源、電(dian)(dian)(dian)壓、電(dian)(dian)(dian)流同(tong)相位現(xian)象，叫做串聯諧(xie)振.

其特點是：電(dian)(dian)(dian)(dian)(dian)(dian)路呈純(chun)電(dian)(dian)(dian)(dian)(dian)(dian)阻性，電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)、電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)和電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)同相(xiang)位(wei)，電(dian)(dian)(dian)(dian)(dian)(dian)抗(kang)X等于(yu)0，阻抗(kang)Z等于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)阻R，此時電(dian)(dian)(dian)(dian)(dian)(dian)路的(de)阻抗(kang)zui小，電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)zui大，在電(dian)(dian)(dian)(dian)(dian)(dian)感和電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)上(shang)可能產(chan)生(sheng)比電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)大很多倍的(de)高電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，因此串聯諧振(zhen)(zhen)也稱(cheng)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)諧振(zhen)(zhen)。 諧振(zhen)(zhen)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)與原電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)疊加.

串聯電路的(de)諧振頻(pin)率是由電路自身參(can)數L、C決定的．與外部(bu)條件(jian)無關，故(gu)又稱電(dian)路的固有頻率。當電(dian)源(yuan)頻率一定時，可(ke)以調節電(dian)路參數L或C，使(shi)電路(lu)固有(you)(you)頻率(lv)(lv)與電源頻率(lv)(lv)一致而(er)發生諧(xie)振；在(zai)電路(lu)參數一定(ding)時，可以改變電源頻率(lv)(lv)使(shi)之(zhi)與電路(lu)固有(you)(you)頻率(lv)(lv)一致而(er)發生諧(xie)振。  

并聯諧(xie)振(zhen)：在電(dian)(dian)(dian)阻、電(dian)(dian)(dian)容、電(dian)(dian)(dian)感(gan)并(bing)聯電(dian)(dian)(dian)路(lu)中，出(chu)現電(dian)(dian)(dian)路(lu)端(duan)電(dian)(dian)(dian)壓和總電(dian)(dian)(dian)流(liu)同相(xiang)位的(de)(de)現象(xiang)，叫做并(bing)聯諧(xie)振(zhen)，其特點是：并(bing)聯諧(xie)振(zhen)是一種*的(de)(de)補償，電(dian)(dian)(dian)源(yuan)無(wu)需提(ti)供無(wu)功功率(lv)，只提(ti)供電(dian)(dian)(dian)阻所需要(yao)的(de)(de)有功功率(lv)，諧(xie)振(zhen)時，電(dian)(dian)(dian)路(lu)的(de)(de)總電(dian)(dian)(dian)流(liu)zui小，而支路(lu)電(dian)(dian)(dian)流(liu)往往大于電(dian)(dian)(dian)路(lu)中的(de)(de)總電(dian)(dian)(dian)流(liu)，因此，并(bing)聯諧(xie)振(zhen)也叫電(dian)(dian)(dian)流(liu)諧(xie)振(zhen)。

串聯諧振裝置(zhi)就用(yong)運(yun)用(yong)串聯諧振原理(li)設計(ji)的型交流耐壓試驗設(she)備。一套串聯諧(xie)振(zhen)耐壓試(shi)驗設備，可兼顧(gu)電(dian)力變壓器、交聯(lian)電纜、開關(guan)柜、電動(dong)機、發電機、GIS和SF6開關(guan)、母線、套管、CT、PT等試(shi)品的(de)交流(liu)耐壓試(shi)驗，是型(xing)的(de)交流(liu)耐壓設備。